Fastest sequence for transferring your DNS from one provider to a nother

[Barry Margolin]

In article <aa6d7n$4jk at pub3.rc.vix.com>, Brian Guild  <Brian at body1.com> wrote:
>2) At my current ISP, I had them change the TTL on the current zone to 1
>day.  It is my understanding that when other name servers see this, they
>will expire their cache and get the information from my new name servers.

But every time they query those servers, they'll get updated NS records
with 1-day TTLs, and the cache expiration timer will reset back to 1 day.
As long as that caching server keeps looking up things in your domain more
than once a day, the obsolete NS records will never expire.

The best solution is to have the old ISP configure their servers as slaves
to the new provider's master.  So anyone with the old NS records cached
will go to the old servers, but they'll get the new data.  After a couple
of days the old NS records should expire, and the old ISP can remove the
zones entirely.

-- 
Barry Margolin, barmar at genuity.net
Genuity, Woburn, MA
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